Geuß M, Löttert L, Böhm T, Hutzler A, Mayrhofer KJ, Thiele S, Cherevko S (2024)
Publication Type: Journal article
Publication year: 2024
Pages Range: 11819-11831
Recently, attempts have been made to understand and quantify Ir dissolution in application-relevant single-cell electrolyzers. While obtaining crucial insights, these studies are hindered by intrinsic system complexity and the required labor-intensive microscopic analyses of cross sections of the used catalyst coated membranes. To expand the understanding of dissolution processes in realistic catalyst layers for the oxygen evolution reaction and to accelerate the discovery of dissolution-stable materials, we utilize herein a gas-diffusion type half-cell setup to observe and quantify Ir dissolution at application-relevant conditions. The operation of this setup allows the recording of multiple measurement points for a single electrode throughout an electrochemical protocol and, thus, the monitoring of changes in the dissolution of the Ir-containing catalyst layer over time. The results indicate (I) a temperature-dependent stabilization and activation of the catalyst during conditioning, (II) a beneficial effect on the Ir stability by the application of a protective voltage, and (III) a lower dissolution of Ir from catalyst layers containing rutile IrO
APA:
Geuß, M., Löttert, L., Böhm, T., Hutzler, A., Mayrhofer, K.J., Thiele, S., & Cherevko, S. (2024). Quantification of Iridium Dissolution at Water Electrolysis Relevant Conditions Using a Gas Diffusion Electrode Half-Cell Setup. ACS Catalysis, 11819-11831. https://doi.org/10.1021/acscatal.4c02159
MLA:
Geuß, Moritz, et al. "Quantification of Iridium Dissolution at Water Electrolysis Relevant Conditions Using a Gas Diffusion Electrode Half-Cell Setup." ACS Catalysis (2024): 11819-11831.
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